#ifndef _PWM_H_
#define _PWM_H_
#include "at32f4xx.h"
#include "at32_board.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "usart3.h"

extern void Timer9_PWM_Init(u16 arr,u16 psc);
#endif
